JP4568097B2 - Steering angle detector - Google Patents

Steering angle detector Download PDF

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JP4568097B2
JP4568097B2 JP2004343545A JP2004343545A JP4568097B2 JP 4568097 B2 JP4568097 B2 JP 4568097B2 JP 2004343545 A JP2004343545 A JP 2004343545A JP 2004343545 A JP2004343545 A JP 2004343545A JP 4568097 B2 JP4568097 B2 JP 4568097B2
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steering angle
angle sensor
king pin
pin
slit
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JP2006151141A (en
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弘司 椎崎
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Tcm株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D15/00Steering not otherwise provided for
    • B62D15/02Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021Determination of steering angle
    • B62D15/023Determination of steering angle by measuring on the king pin

Description

本発明は、例えば三輪式フォークリフトやリーチ式フォークリフト等の荷役車両に適用される操舵角検出装置の改良に関する。   The present invention relates to an improvement in a steering angle detection device applied to a cargo handling vehicle such as a three-wheel forklift or a reach forklift.

従来、この種の操舵角検出装置としては、例えば次の様なものが知られている。
(1) 車体に旋動可能に設けられたキングピンと、キングピンの上面に固定されたハット型のカップリングブラケットと、カップリングブラケットの中央部に形成された長穴と、カップリングブラケットの上方に位置すべく車体に設けられた操舵角センサと、操舵角センサの入力軸に形成されて長穴に嵌合される二面幅部と、から構成されている。(特許文献1参照)
(2) 固定側に旋動可能に設けられたキングピンと、キングピンの上方に偏心して位置すべく固定側に設けられた操舵角センサと、操舵角センサの入力軸に設けられた作動レバーと、作動レバーに形成されたスリットと、キングピンに設けられた板体と、キングピンに対して偏心すべく板体に設けられてスリットに嵌合される作動ピンと、から構成されている。(特許文献2参照)
Conventionally, for example, the following devices are known as this type of steering angle detection device.
(1) A king pin provided on the vehicle body so as to be rotatable, a hat-type coupling bracket fixed to the upper surface of the king pin, a long hole formed in the center of the coupling bracket, and above the coupling bracket The steering angle sensor is provided on the vehicle body to be positioned, and a two-sided width portion formed on the input shaft of the steering angle sensor and fitted in the elongated hole. (See Patent Document 1)
(2) a king pin provided on the fixed side so as to be rotatable, a steering angle sensor provided on the fixed side to be eccentrically positioned above the king pin, an operating lever provided on an input shaft of the steering angle sensor, A slit formed in the operating lever, a plate provided on the king pin, and an operating pin provided on the plate to be eccentric with respect to the king pin and fitted into the slit. (See Patent Document 2)

特開平11−5555号公報Japanese Patent Laid-Open No. 11-5555 特開2003−118993号公報JP 2003-118993 A

ところが、前者のものは、カップリングブラケットの弾性変形を利用して偏心量を吸収する様にしているので、カップリングブラケットの変形荷重が舵角センサに常に作用してこれの寿命を縮めると共に、カップリングブラケットの弾性力が経年劣化するので、耐久性に乏しいという問題があった。
これに対して後者のものは、この様な問題点を解消できるものの、キングピンに板体を介して作動ピンを設ける必要があったので、それだけ構造が複雑化すると共に、キングピンの上部周辺が嵩張って大きな設置スペースが必要であった。
However, the former is designed to absorb the amount of eccentricity by utilizing the elastic deformation of the coupling bracket, so that the deformation load of the coupling bracket always acts on the rudder angle sensor to shorten its life, Since the elastic force of the coupling bracket deteriorates over time, there was a problem that the durability was poor.
On the other hand, the latter can solve such problems, but it is necessary to provide an operating pin on the king pin through a plate, so that the structure is complicated and the upper periphery of the king pin is bulky. A large installation space was required.

本発明は、叙上の問題点に鑑み、これを解消する為に創案されたもので、その課題とする処は、構造が簡略化されて設置スペースも小さくて済む操舵角検出装置を提供するにある。   The present invention has been devised in view of the problems described above, and a problem to be solved by the present invention is to provide a steering angle detection device that has a simplified structure and requires less installation space. It is in.

本発明の操舵角検出装置は、基本的には、車体に旋動可能に設けられたキングピンと、キングピンの上方に位置すべく車体に設けられた操舵角センサと、操舵角センサの入力軸に設けられた作動レバーと、作動レバーに設けられて操舵角センサの入力軸とキングピンに対して偏心されている作動ピンと、キングピンの上面に直径方向に形成されて作動ピンが嵌合されるスリットと、から構成した事を特徴とする。   The steering angle detection device according to the present invention basically includes a king pin that is turnable on the vehicle body, a steering angle sensor that is provided on the vehicle body so as to be positioned above the king pin, and an input shaft of the steering angle sensor. An actuating lever provided, an actuating pin provided on the actuating lever and eccentric with respect to the input shaft of the steering angle sensor and the king pin, and a slit formed in a diametrical direction on the upper surface of the king pin and fitted with the actuating pin. It is characterized by comprising.

操舵輪が操舵されると、これに伴ってキングピンが車体に対して旋動される。キングピンが旋動されると、その旋動力がスリットとこれに嵌合する作動ピンとこれが設けられた作動レバーを介して操舵角センサの入力軸に伝達され、キングピンの操舵角が操舵角センサに依り検出される。
この時、作動レバーに設けられた作動ピンが操舵角センサの入力軸及びキングピンに対して所定の偏心状態でスリットに常に嵌合する様にしているので、キングピンと操舵角センサの入力軸が仮え偏心状態であっても、その偏心量が速やかに吸収され、キングピンの回転が操舵角センサに的確に伝達される。
When the steered wheel is steered, the king pin is turned with respect to the vehicle body. When the king pin is turned, the turning power is transmitted to the input shaft of the steering angle sensor through the slit, the operating pin fitted to the slit, and the operating lever provided with the slit, and the steering angle of the king pin depends on the steering angle sensor. Detected.
At this time, since the operating pin provided on the operating lever is always fitted into the slit in a predetermined eccentric state with respect to the input shaft and king pin of the steering angle sensor, the king pin and the input shaft of the steering angle sensor are temporarily connected. Even in the eccentric state, the amount of eccentricity is quickly absorbed, and the rotation of the kingpin is accurately transmitted to the steering angle sensor.

本発明に依れば、次の様な優れた効果を奏する事ができる。
(1) キングピン、操舵角センサ、作動レバー、作動ピン、スリットとで構成し、とりわけ操舵角センサの入力軸に作動レバーを介して作動ピンを設けると共に、この作動ピンが嵌合されるスリットをキングピンの上面に形成したので、構造が簡略化されて設置スペースも小さくて済む。
According to the present invention, the following excellent effects can be achieved.
(1) It is composed of a king pin, a steering angle sensor, an operating lever, an operating pin, and a slit. In particular, an operating pin is provided on the input shaft of the steering angle sensor via the operating lever, and a slit in which the operating pin is fitted is provided. Since it is formed on the upper surface of the kingpin, the structure is simplified and the installation space is small.

以下、本発明の実施の形態を、図面に基づいて説明する。
図1は、本発明の第一例に係る操舵角検出装置を示す一部を縦断した正面図。図2は、図1の拡大略式平面図。図3は、要部のみを示す斜視図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a part of a steering angle detection device according to a first example of the present invention. FIG. 2 is an enlarged schematic plan view of FIG. FIG. 3 is a perspective view showing only the main part.

操舵角検出装置1は、キングピン2、操舵角センサ3、作動レバー4、作動ピン5、スリット6とからその主要部構成されて居り、三輪式フォークリフトに適用される。
三輪式フォークリフトは、図略しているが、車体7の前部に左右一対の前輪が配置されると共に、車体7の後部中央に後輪となる操舵輪が配置されている。操舵輪は、リヤアクスル8の下部に設けられた車軸に依り水平軸廻りに回転可能に設けられていると共に、リヤアクスル8の上部に設けられたキングピン2に依り縦軸廻りに旋動可能に設けられている。
The steering angle detection device 1 is composed of a king pin 2, a steering angle sensor 3, an operating lever 4, an operating pin 5, and a slit 6, and is applied to a three-wheeled forklift.
Although the three-wheel forklift is not shown, a pair of left and right front wheels are disposed at the front portion of the vehicle body 7 and a steering wheel serving as a rear wheel is disposed at the center of the rear portion of the vehicle body 7. The steering wheel is provided so as to be rotatable around a horizontal axis by an axle provided at the lower part of the rear axle 8, and is provided to be rotatable around a vertical axis by means of a king pin 2 provided at the upper part of the rear axle 8. ing.

キングピン2は、車体7に旋動可能に設けられたもので、この例では、荷役車両の車体7に設けられたアクスルボス9にベアリング10を介して旋動可能に支持されている。つまり、車体7とアクスルボス9は、所謂固定側となり、キングピン2は、この固定側に対して所定の操舵角(略180度以内)だけ旋動可能に設けられている。   The king pin 2 is provided on the vehicle body 7 so as to be rotatable. In this example, the king pin 2 is supported by an axle boss 9 provided on the vehicle body 7 of the cargo handling vehicle via a bearing 10 so as to be capable of turning. That is, the vehicle body 7 and the axle boss 9 are on the so-called fixed side, and the king pin 2 is provided so as to be able to rotate by a predetermined steering angle (within approximately 180 degrees) with respect to the fixed side.

操舵角センサ3は、キングピン2の上方に位置すべく車体7に設けられたもので、この例では、ポテンショメータにしてあり、入力軸11が下向きにされて正面略Z型を呈する取付ブラケット12を介してアクスルボス9に取付けられている。
操舵角センサ3は、入力軸11を含む軸心Aがキングピン2の軸心Bの鉛直線上に配置されて所謂キングピン2に対して同心状態に配されている。取付ブラケット12は、ボルト13に依りアクスルボス9に着脱可能に取付けられていると共に、操舵角センサ3は、ボルト14と長穴(図示せず)に依り取付ブラケット12に対して前後方向(図1及び図2に於て左右方向)に調整移動可能に取付けられている。入力軸11には、図略しているが、雄螺子と廻止部が形成されている。
The steering angle sensor 3 is provided on the vehicle body 7 so as to be positioned above the kingpin 2. In this example, the steering angle sensor 3 is a potentiometer, and a mounting bracket 12 having a substantially Z-shaped front surface with the input shaft 11 facing downward is provided. To the axle boss 9.
In the steering angle sensor 3, the axis A including the input shaft 11 is arranged on the vertical line of the axis B of the kingpin 2 and is arranged concentrically with the so-called kingpin 2. The mounting bracket 12 is detachably attached to the axle boss 9 by a bolt 13, and the steering angle sensor 3 is anteroposterior to the mounting bracket 12 by a bolt 14 and a long hole (not shown) (FIG. 1). And in the left-right direction in FIG. Although not shown, the input shaft 11 is formed with a male screw and a rotation stop.

作動レバー4は、操舵角センサ3の入力軸11に設けられたもので、この例では、平板状を呈し、その一側には、操舵角センサ3の入力軸11の廻止部に適合して廻止めする為の廻止穴(図示せず)が形成されて居り、操舵角センサ3の入力軸11の雄螺子とこれに螺合するナット15に依り着脱可能に取付けられている。   The actuating lever 4 is provided on the input shaft 11 of the steering angle sensor 3. In this example, the actuating lever 4 has a flat plate shape, and one side thereof is adapted to a stop portion of the input shaft 11 of the steering angle sensor 3. A rotation stop hole (not shown) is formed and is detachably attached by a male screw of the input shaft 11 of the steering angle sensor 3 and a nut 15 screwed to the male screw.

作動ピン5は、作動レバー4に設けられて操舵角センサ3の入力軸9とキングピン2に対して偏心されているもので、この例では、作動レバー4の他側に垂下状態に一体に設けられて居り、その軸心Cが操舵角センサ3の入力軸11の軸心Aとキングピン2の軸心Bに対して所定の偏心量Dだけ偏心されている。偏心量Dは、キングピン2の半径よりも小さくしてある。   The operating pin 5 is provided on the operating lever 4 and is eccentric with respect to the input shaft 9 of the steering angle sensor 3 and the king pin 2. In this example, the operating pin 5 is integrally provided on the other side of the operating lever 4 in a suspended state. The shaft center C is decentered by a predetermined eccentric amount D with respect to the shaft center A of the input shaft 11 of the steering angle sensor 3 and the shaft center B of the kingpin 2. The amount of eccentricity D is smaller than the radius of the kingpin 2.

スリット6は、キングピン2上面に直径方向に形成されて作動ピン5が嵌合されるもので、この例では、作動ピン5が嵌合される所定の幅と深さを備えて居り、キングピン2の上面を直径方向に削除する事に依り形成されている。   The slit 6 is formed in the diameter direction on the upper surface of the king pin 2 and is fitted with the operating pin 5. In this example, the slit 6 has a predetermined width and depth into which the operating pin 5 is fitted. It is formed by removing the upper surface of the diametrical direction.

次に、この様な構成に基づいてその作用を述解する。
操舵輪が所定の操舵角だけ操舵されると、これに伴ってキングピン2が車体7に対して旋動される。キングピン2が旋動されると、その旋動力がスリット6とこれに嵌合する作動ピン5とこれが設けられた作動レバー4を介して操舵角センサ3の入力軸11に伝達され、キングピン2の操舵角が操舵角センサ3に依り検出される。
この時、作動レバー4に設けられた作動ピン5が操舵角センサ3の入力軸11及びキングピン2に対して所定の偏心状態でスリット6に常に嵌合されているので、キングピン2の回転が操舵角センサ3に的確に伝達され、操舵輪の操舵角が電気的に検出されて制御手段へ送られる。
Next, the operation will be described based on such a configuration.
When the steered wheel is steered by a predetermined steering angle, the king pin 2 is rotated with respect to the vehicle body 7 accordingly. When the king pin 2 is turned, the turning power is transmitted to the input shaft 11 of the steering angle sensor 3 through the slit 6, the operating pin 5 fitted to the slit 6, and the operating lever 4 provided with the slit 6. The steering angle is detected by the steering angle sensor 3.
At this time, since the operating pin 5 provided on the operating lever 4 is always fitted to the slit 6 in a predetermined eccentric state with respect to the input shaft 11 and the king pin 2 of the steering angle sensor 3, the rotation of the king pin 2 is steered. It is accurately transmitted to the angle sensor 3, and the steering angle of the steered wheel is electrically detected and sent to the control means.

キングピン2の上面を利用してスリット6を形成すると共に、このスリット6に常時嵌合すべく作動ピン5を作動レバー4に設ける様にしたので、構造が簡略化されて設置スペースも小さくて済む。   Since the slit 6 is formed using the upper surface of the king pin 2 and the operating pin 5 is provided on the operating lever 4 so as to be always fitted in the slit 6, the structure is simplified and the installation space can be reduced. .

次に、本発明の第二例を、図4及び図5に基づいて説明する。
図4は、本発明の第二例に係る操舵角検出装置を示す一部を縦断した正面図。図5は、図4の拡大略式平面図である。
第二例は、操舵角センサ3の入力軸11の軸心Aがキングピン2の軸心Bに対して所定の偏心量Eだけ偏心して設けた点が第一例とは異なり、その他は第一例と同様である。
この様なものは、操舵角センサ3の入力軸11がキングピン2に対して偏心していても、この偏心量Eが速やかに吸収される。この為、操舵角センサ3の設置に際しては、キングピン2に正確に同心状態にする必要がなく、加工精度や組立精度を厳密にする必要がなく、作業性を大いに向上する事ができる。
Next, a second example of the present invention will be described with reference to FIGS.
FIG. 4 is a front view in which a part of the steering angle detection device according to the second example of the present invention is vertically cut. FIG. 5 is an enlarged schematic plan view of FIG.
The second example is different from the first example in that the axis A of the input shaft 11 of the steering angle sensor 3 is provided with a predetermined eccentricity E with respect to the axis B of the kingpin 2. Similar to the example.
In such a case, even if the input shaft 11 of the steering angle sensor 3 is eccentric with respect to the king pin 2, the eccentric amount E is quickly absorbed. For this reason, when the steering angle sensor 3 is installed, it is not necessary to be accurately concentric with the kingpin 2, and it is not necessary to make the processing accuracy and assembly accuracy strict, and the workability can be greatly improved.

尚、操舵角検出装置1は、先の例では、三輪式フォークリフトの操舵輪に適用したが、これに限らず、例えばリーチ式フォークリフト等の荷役車両の操舵輪に適用しても良い。   Although the steering angle detection device 1 is applied to the steering wheel of a three-wheeled forklift in the previous example, the present invention is not limited thereto, and may be applied to the steering wheel of a cargo handling vehicle such as a reach-type forklift.

本発明の第一例に係る操舵角検出装置を示す一部を縦断した正面図。The front view which cut through a part which shows the steering angle detection apparatus concerning the 1st example of the present invention longitudinally. 図1の拡大略式平面図。The enlarged schematic plan view of FIG. 要部のみを示す斜視図。The perspective view which shows only the principal part. 本発明の第二例に係る操舵角検出装置を示す一部を縦断した正面図。The front view which longitudinally cut part which shows the steering angle detection apparatus which concerns on the 2nd example of this invention. 図4の拡大略式平面図。FIG. 5 is an enlarged schematic plan view of FIG. 4.

符号の説明Explanation of symbols

1…操舵角検出装置、2…キングピン、3…操舵角センサ、4…作動レバー、5…作動ピン、6…スリット、7…車体、8…リヤアクスル、9…アクスルボス、10…ベアリング、11…入力軸、12…取付ブラケット、13…ボルト、14…ボルト、15…ナット、A…操舵角センサの軸心、B…キングピンの軸心、C…作動ピンの軸心、D…キングピンと作動ピンとの偏心量、E…キングピンと操舵角センサとの偏心量。

DESCRIPTION OF SYMBOLS 1 ... Steering angle detection apparatus, 2 ... King pin, 3 ... Steering angle sensor, 4 ... Actuation lever, 5 ... Actuation pin, 6 ... Slit, 7 ... Car body, 8 ... Rear axle, 9 ... Axle boss, 10 ... Bearing, 11 ... Input Axis, 12 ... mounting bracket, 13 ... bolt, 14 ... bolt, 15 ... nut, A ... axis of steering angle sensor, B ... axis of king pin, C ... axis of operating pin, D ... king pin and operating pin Eccentricity, E: Eccentricity between the kingpin and the steering angle sensor.

Claims (1)

車体に旋動可能に設けられたキングピンと、キングピンの上方に位置してキングピンに対して同心状態又は偏心状態にすべく車体に調整移動可能に設けられた操舵角センサと、操舵角センサの入力軸に設けられた作動レバーと、作動レバーに設けられて操舵角センサの入力軸とキングピンに対して偏心されている作動ピンと、キングピンの上面に直径方向に形成されて作動ピンが嵌合されるスリットと、から構成した事を特徴とする操舵角検出装置。 A king pin that can be turned on the vehicle body, a steering angle sensor that is located above the king pin and can be adjusted and moved to be concentric or eccentric with the king pin, and an input of the steering angle sensor An operation lever provided on the shaft, an operation pin provided on the operation lever and eccentric with respect to the input shaft of the steering angle sensor and the king pin, and an operation pin formed in the diametrical direction on the upper surface of the king pin. A steering angle detection device characterized by comprising a slit.
JP2004343545A 2004-11-29 2004-11-29 Steering angle detector Expired - Fee Related JP4568097B2 (en)

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